Vacuum cleaner filter adapter ring



FIG. 1 is an isometric view of a vacuum cleaner filter adapter ring showing our new design;

FIG. 2 is a top plan view thereof, the bottom plan view being a mirror image;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a left side view thereof; and,

FIG. 7 is an isometric view thereof, showing the filter adapter ring mounted on an exemplary filter.

In the drawings, broken lines indicate environmental structure or boundaries that form no part of the claimed design. 

CLAIM The ornamental design for a vacuum cleaner filter adapter ring, as shown and described. 